Resource Nodes

Resource Nodes are objects on the world map that provide a small amount of resources when you attack them. They come in a variety of sizes. To visit a resource node costs 6 AP on week days. On Weekends and during Happy Hour cost reduces to 3 AP or half AP.

Focus on resources that have 5 or 6 stars because they are the biggest bang for your AP.

Attach all the mines (gold, sulfur, crystal, lumber, ore) to your main castle. This is because if you attach them to a secondary castle and that castle is taken over, which can't happen to your main castle, you will lose all the mines that are attached to it.